公称通径

Inside nominal diameter

DN

公称压力

Nominal pressure

MPa

平衡外径d_em

The average diameter

UPVC管壁厚及偏差

Wall thickness of UPVC pipes and deviations

S₁

S₃

S₂+ S₃≈S₄

S₄允许偏差

Tolerance

预留长度

Reserved

length

L₁

公称通径dn

Nominal outer diameter

允许偏差

tolerance

15

1.6

20

+0.2

0

2.5

+0.5

0

2.5

3

+0.4

0

44

20

1.6

25

+0.2

0

2.5

+0.5

0

2.5

3

+0.4

0

47

25

1.6

32

+0.2

0

2.8

+0.5

0

2.5

3

+0.4

0

50

32

1.6

40

+0.2

0

3.0

+0.5

0

2.5

3

+0.4

0

55

40

1.6

50

+0.2

0

3.5

+0.6

0

3

3.5

+0.5

0

56

50

1.6

63

+0.3

0

4.5

+0.7

0

3

3.5

+0.5

0

58

65

1.6

75

+0.3

0

5.3

+0.7

0

3

3.5

+0.5

0

66

80

1.6

90

+0.3

0

6.4

+0.9

0

3

3.5

+0.5

0

72

100

1.6

110

+0.4

0

7.8

+1.0

0

3

3.5

+0.6

0

82

125

1.6

140

+0.5

0

9.7

+1.2

0

3.5

4

+0.6

0

96

150

1.6

160

+0.5

0

11.0

+1.4

0

3.5

4

+0.6

0

106

200

1.6

225

+0.7

0

12.5

+1.5

0

3.5

4

+0.6

0

140

250

1.6

280

+0.9

0

14.0

+1.7

0

4

4.5

+0.7

0

166

300

1.6

315

+1.0

0

16.0

+1.9

0

4

4.5

+0.7

0

184

350

1.6

355

+1.1

0

17.0

+2.0

0

5

5.5

+0.8

0

204

400

1.6

400

+1.2

0

18.1

+2.1

0

5

5.5

+0.8

0

226

注：复合管材长度L一般为4m或6m，也可由供需双方协商确定。

Note:The length of the compounded pipes is generally 4m or 6m, which can be determined upon negotiations between both parties.